PLATE 17. 



Lopadorrhynchus nans Chamberlin. 



Figures 1-5. 



1. — Parapodium from middle region. X 45. 



2. — Compound seta, distal end, from middle region of body. X 281. 



3. — Simple ventral seta, ti[i, from middle region of body. X 281. 



4. — Distal end of shaft of compound seta, viewed from edge, from middle region of body. X 1110. 



5. — Side view of the same. X 1110. 



Lopadorrhynchus parvum Chamberlin. 



Figures 6, 7. 



6. — Seventh left parapodium. X 63. 



7. — Compound seta, seventh parapodium. X 281. 



Mastigethus errans Chamberlin. 

 Figures 8, 9. 



8. — Anterior region, dorsal view. X 27. 

 9. — Proboscis, ventral view. X 27. 



